Wet/dry automatic injector assembly
First Claim
1. An automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof, said automatic injection device comprising:
- a housing assembly;
a dry compartment located within the housing for storing a predetermined dry charge of dry medicament therein;
a wet compartment located within the housing for storing a predetermined amount of liquid injection solution therein;
an activation assembly for pressurizing the liquid injection solution in the wet compartment, wherein the activation assembly permits passage of the liquid injection solution from the wet compartment to the dry compartment upon activation of the automatic injection device; and
a needle assembly for dispensing the liquid injection solution containing the medicament dissolved therein, wherein the activation assembly includes a drive assembly, whereby upon actuation of the activation assembly, the drive assembly releases a stored source of energy for causing the liquid injection solution in the wet compartment to be transferred to the dry compartment and the liquid injection solution containing the medicament to be dispensed through the needle assembly.
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Accused Products
Abstract
The present invention is directed to an automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof. The present invention is directed to an automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof. The injection device includes a housing assembly, a dry compartment located within the housing for storing a predetermined dry charge of dry medicament therein, and a wet compartment located within the housing for storing a predetermined amount of liquid injection solution therein. The injection device further includes an activation assembly that enables the pressurization of the liquid injection solution in the wet compartment. The activation assembly also enables the compression of the dry medicament within the dry compartment upon activation of the automatic injection device. The activation assembly further facilitates passage of the liquid injection solution from the wet compartment to the dry compartment upon activation of the automatic injection device.
104 Citations
15 Claims
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1. An automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof, said automatic injection device comprising:
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a housing assembly;
a dry compartment located within the housing for storing a predetermined dry charge of dry medicament therein;
a wet compartment located within the housing for storing a predetermined amount of liquid injection solution therein;
an activation assembly for pressurizing the liquid injection solution in the wet compartment, wherein the activation assembly permits passage of the liquid injection solution from the wet compartment to the dry compartment upon activation of the automatic injection device; and
a needle assembly for dispensing the liquid injection solution containing the medicament dissolved therein, wherein the activation assembly includes a drive assembly, whereby upon actuation of the activation assembly, the drive assembly releases a stored source of energy for causing the liquid injection solution in the wet compartment to be transferred to the dry compartment and the liquid injection solution containing the medicament to be dispensed through the needle assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of mixing a dry medicament with a liquid injection solution in an automatic injection device for administering a dosage of medicament to a user, wherein the automatic injection device includes a dry compartment for storing the dry medicament prior to mixing, a wet compartment for storing a supply of liquid injection solution prior to mixing, and a needle assembly for transferring a mixture of dissolved dry medicament and the liquid injection solution to a user, the method comprising:
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activating the automatic injection device whereby the following automatically occurs;
pressurizing the liquid injection solution in the wet compartment;
compressing the dry medicament in the dry compartment;
opening a fluid path between the wet compartment and the dry compartment to permit the passage of the liquid injection solution from the wet compartment to the dry compartment;
dissolving the dry medicament in the liquid injection solution within the dry compartment; and
transferring the mixture of the dissolved dry medicament and the liquid injection solution through the needle assembly to the user. - View Dependent Claims (13, 14, 15)
transferring a force from the first pressure element to a second pressure element; and
compressing the dry medicament with the second pressure element.
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15. The method according to claim 14, wherein the opening of the fluid path between the wet compartment and the dry compartment comprises:
moving the second pressure element from a first position to permit the passage of the liquid injection solution from the wet compartment to the dry compartment around the second pressure element.
Specification